Engine 2014: Motor Plants and Auxiliary Boilers

1. A A 100% ethylene glycol solution gives the greatest protection against freezing.
2. B The boiling temperature of the solution remains constant at the level of greatest protection against freezing to -70°F (-57°C).
3. C With antifreeze protection of -60°F (- 51°C), the boiling temperature could be 230°F to 250°F (110°C to 121°C).
4. D A 30% solution of ethylene glycol will protect the cooling system at temperatures of -18°F (-26°C).

Tip: press A-D to answer